Failed transistors: The transistors in the control board are susceptible to damage due to power surges, static electricity, and age. Transistors are often the first part of a control board to fail. Loose wiring: The vibrations of the furnace over the years can cause wiring in the control board to shake loose.

What causes HVAC control board failure?

Failed transistors: The transistors in the control board are susceptible to damage due to power surges, static electricity, and age. Transistors are often the first part of a control board to fail. Loose wiring: The vibrations of the furnace over the years can cause wiring in the control board to shake loose.

When should I replace my furnace control board?

A furnace circuit board lasts 10 to 15 years on average, depending on the furnace condition, usage, and level of maintenance.

How much does it cost to replace a control board on a furnace?

A furnace circuit board replacement can cost between $550 – $1,100, depending on how complex your system is.

How do I reset my HVAC control board?

How Do I Reset My Air Conditioning Unit?

1. Shut it Off. First, turn off your AC before resetting the thermostat.
2. Get to the Circuit Breaker. So far, so good.
3. Wait 30 Seconds. After turning off the circuit breaker linked to the AC unit, wait for a full minute.
4. Turn it Back On.

How do I reset my AC control board?

How to Reset an Air Conditioner

1. Power down your AC. Start at your circuit breaker panel and flip the breaker that powers your AC.
2. Find the button. Most air conditioning units are equipped with a reset button.
3. Hold down the reset button for 3 to 5 seconds and then release.
4. Restore power to your AC.

Why do control boards go bad?

Control boards can go bad for many reasons. A lot of times, a short circuit in the board will cause it to fry. Other times, an electrical component will malfunction and cause strange behavior. Or if your furnace won’t turn on at all.

How much does it cost to replace a furnace control board?

$300 to $650
A furnace control board replacement costs $300 to $650 on average. A furnace circuit board or motherboard costs $50 to $300 for the part alone, plus $250 to $350 for replacement labor….Furnace control board replacement cost.